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Supporting the construction of workflows for biodiversity problem-solving accessing secure, distributed resources

机译:支持构建解决生物多样性问题的工作流,以访问安全的分布式资源

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摘要

In the Biodiversity World (BDW) project we have created a flexible and extensible Web Services-based Grid environment for biodiversity researchers to solve problems in biodiversity and analyse biodiversity patterns. In this environment, heterogeneous and globally distributed biodiversity-related resources such as data sets and analytical tools are made available to be accessed and assembled by users into workflows to perform complex scientific experiments. One such experiment is bioclimatic modelling of the geographical distribution of individual species using climate variables in order to explain past and future climate-related changes in species distribution. Data sources and analytical tools required for such analysis of species distribution are widely dispersed, available on heterogeneous platforms, present data in different formats and lack inherent interoperability. The present BDW system brings all these disparate units together so that the user can combine tools with little thought as to their original availability, data formats and interoperability. The new prototype BDW system architecture not only brings together heterogeneous resources but also enables utilisation of computational resources and provides a secure access to BDW resources via a federated security model. We describe features of the new BDW system and its security model which enable user authentication from a workflow application as part of workflow execution.
机译:在生物多样性世界(BDW)项目中,我们为生物多样性研究人员创建了一个灵活且可扩展的基于Web服务的网格环境,以解决生物多样性问题并分析生物多样性模式。在这种环境下,用户可以访问异构和全球分布的与生物多样性相关的资源,例如数据集和分析工具,并将其组装到工作流中,以执行复杂的科学实验。一种这样的实验是使用气候变量对单个物种的地理分布进行生物气候建模,以解释过去和未来与气候相关的物种分布变化。进行物种分布分析所需的数据源和分析工具分布广泛,可在异构平台上使用,以不同的格式显示数据并且缺乏固有的互操作性。当前的BDW系统将所有这些不同的单元组合在一起,以便用户可以结合使用工具,而无需考虑其原始可用性,数据格式和互操作性。新的原型BDW系统架构不仅将异构资源整合在一起,而且还可以利用计算资源,并通过联合安全模型提供对BDW资源的安全访问。我们描述了新的BDW系统及其安全模型的功能,这些功能使工作流应用程序中的用户身份验证成为工作流执行的一部分。

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